Mastodon, a decentralized social media platform that many are turning to as a Twitter alternative, saw its userbase skyrocket from about 300,000 monthly active users to 2.5 million between October and November, Mastodon’s CEO, founder, and lead developer Eugen Rochko said in a new blog post. Elon Musk officially took over Twitter in late October, meaning Mastodon’s huge jump in users almost directly followed Musk’s new ownership.